California Code, Family Code - FAM § 5103

(a) Notwithstanding Section 2060, an order for the payment of child, family, or spousal support may be enforced against an employee benefit plan regardless of whether the plan has been joined as a party to the proceeding in which the support order was obtained.

(b) Notwithstanding Section 697.710 of the Code of Civil Procedure, an execution lien created by a levy on the judgment debtor's right to payment of benefits from an employee benefit plan to enforce an order for the payment of child, family, or spousal support continues until the date the plan has withheld and paid over to the levying officer, as provided in Section 701.010 of the Code of Civil Procedure, the full amount specified in the notice of levy, unless the plan is directed to stop withholding and paying over before that time by court order or by the levying officer.

(c) A writ of execution pursuant to which a levy is made on the judgment debtor's right to payment of benefits from an employee benefit plan under an order for the payment of child, family, or spousal support shall be returned not later than one year after the date the execution lien expires under subdivision (b).